<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>双飞翼布局</title>
    <style>
        
        .main-wrap {
            margin-left: 150px;
            margin-right: 190px;
            background-color:yellow;
        }
        .main {
            width: 100%;
            float: left;
        }
        .left {
            float: left;
            width: 190px;
            margin-left: -100%;
            background-color: aqua;
        }
        .right {
            float: left;
            width: 190px;
            margin-left: -190px;
            background-color: brown;
        }
    </style>
</head>

<body>
    <div class=".main-wrap">
        <div class="main">111</div>
    </div>
    <div class="left">222</div>
    <div class="right">333</div>

</body>

</html>